78 University of California Publications. Lzoologt. 



Plumularia lagenifera, var. septifera. 



PI. XI. Figs. 101, 102. 



Trophosome. Stems 10-15 mm. high, from creeping stolon, in loose 

 clusters. Divided by transverse septa into equal internodes with a con- 

 spicuous septum at each end and on the shoulder which carries hydro- 

 cladium. Nematophores in axils of hydroeladia and one on each internode 

 on side opposite branch and immediately distal to proximal septum. 



One hydrocladium from the distal portion of each internode; branches 

 alternate, all in one plane ; divided transversely into unequal internodes, 

 the intermediate usually less than half as long as the thecate, witli one 

 strong septum near the proximal end and one nematophore immediately 

 distal to it. Thecate internodes alternate with intermediate; hydrothecae 

 near middle of each internode, slightly broader than deep. Three septa, all 

 heavy, on distal side of branch; one at proximal end on a slight swelling 

 of internode, one at distal end, one opposite hydrotheeal septum, and 

 sometimes a fourth between the latter and the distal septum. .Mesial 

 nematophore attached immediately above proximal septum; supracalycine 

 nematophores attached below the mouth of hydrothecae. Hydranth with 

 fifteen tentacles. 



Gonosome. Gonotheeae borne in pairs, one on each side of the shoulder 

 processes of the stem internodes; broadly ovate, compressed, with narrow 

 neck terminated by small circular orifice. Gonophores in the form of sporo- 

 sacs, numerous, packed together without apparent order. 



Stem and branches light brown to colorless. 



Distribution. Catalina I., Cal. Growing on seaweed frond. 

 July, 1901. 



This variety closely resembles the typical P. lagenifera Allman, 

 from which it may be distinguished by its unusually heavy septal 

 ridges. It is more constant than the latter in certain characters; 

 there is never more than one internode between thecate inter- 

 nodes, and no intermediate internode has more than one septa] 

 ridge, which is always very heavy. 



Plumularia plumularoides Clark. 



PI. XI. Figs. 103, 104. 

 Halecium plumularoides, Clark, Proe. Ac. Nat. Sc. Phil., 1876, XXVII, 



p. 217. 

 Plumularia plumularoides, Nutting, Am. Bydr. Pt. I. The Plumular- 



idae, 1901, p. 62. 



Distribution. San Diego, Cal., dredged from a bottom of 

 cobbles and sand, 15-25 fathoms. Cape Etolin, Nunivak I., Al., 

 8-10 fathoms (Clark). 



